Traversor guide apparatus

ABSTRACT

A traversor guide apparatus is disclosed. The present invention makes it possible to accurately measure a moved distance of an object by keeping a wire tightly wound on a bobbin even when a bobbin has an instant rotation.

TECHNICAL FIELD

The present invention relates to a traversor guide apparatus, and inparticular to a traversor guide apparatus which makes it possible toaccurately measure a moved distance of an object by keeping a wiretightly wound on a bobbin even when a bobbin instantly rotates.

BACKGROUND ART

The conventional traversors are disclosed in a Korean utility modelpublication number 1989-7806 entitled “traversor”, a Korean patentregistration number 10-214358 entitled “a traversor guide apparatus witha continuously variable transmission function”, and a Korean utilitymodel registration number 20-431019 entitled “traversor apparatus”.

The Korean utility model publication number 1989-7806 entitled“traversor” is characterized in that an eccentric shaft in the interiorof a body is made to cooperate with an angle adjusting lever and isclosely attached to a semicircular tooth-shaped scale plate fixed at afront side, and a left and right movement bearing is installed at alower side and is elastically disposed at an automatic operation memberby using a coil spring, and a main drive bearing is inserted into acentral shaft axially disposed at the automatic operation member and issupported at one side of the eccentric shaft, and a driven beating isaxially supported at both sides, and a direction switch bracket isattached at its upper side for cooperation, so a steel material with acircular cross section can be reliably wound on a bobbin at regularintervals.

Next, the Korean patent registration number 10-214358 entitled “atraversor guide apparatus with a continuously variable transmissionfunction” is characterized to comprise a slide shaft horizontallydisposed at a rotatable body connected with a motor, a pair of slidebars which are horizontally disposed at the body and are positioned justabove the slide shaft, a drive slider which can reciprocate straightalong the slide shaft, a driven slider which is inserted movable intothe slide bar in an engaged state to the drive slider, a support platewhich is fixedly installed at the ends of the slide shaft and the slidebar, and a limit switch which is installed at a lower side of the driveslider and comes into contact with an operation plate which is installedat the body and the support plate, respectively, so the moving speed ofthe winding object guide can be optimum controlled to meet the generalcondition without changing the rotation speed of the slide shaft whenthe characteristic or the winding condition of the winding object ischanged.

Next, the Korean utility model registration number 20-431019 entitled“traversor apparatus” is characterized to comprise a normal and reverserotation driving force transfer apparatus engaged at an end portion of atable frame, a main shaft of which one end is engaged at the normal andreverse rotation driving force transfer apparatus, and the other end isengaged at a shaft rest disposed at the other end of the table frame, aslider which is engaged at the main shaft and moves left and right bymeans of the rotation of the main shaft, a guide shaft which is disposedin parallel with the main shaft for guiding the movement of the slider,a touch sensor which is engaged at two fixing shafts disposed at thelower side of the main shaft or limiting the moving range of the slider,a controller which is engaged at the table frame in such a way tocontrol the operation of the normal and reverse rotation driving forcetransfer apparatus by receiving a signal from the touch sensor, and adriving motor which is disposed at a lower side of the table frame andtransfers a driving force to the normal and reverse rotation drivingforce transfer apparatus via a belt, so that it is possible to preciselyadjust the winding pitches of the steel material wound on the bobbin byvery precisely controlling the moving speed of the slider.

The above-described conventional arts are directed to a winding per se;however the traversor of FIG. 1 is used a measuring sensor which makesit possible to measure the moved distance of an object, to be measured,like a cylinder or other firefighting hose, the cylinder designed toopen the water gate by using a change in the length of the wire wound onthe bobbin.

The wire connected to the measured object is wound or unwound from thebobbin 105 as the measured object moves; at this time a moving distancecomputation unit installed at one side of a rotary shaft 104 whichfunctions like a rotation center of the bobbin 105 computes a moveddistance of the measured object by computing the change in the length ofthe wire wound on the bobbin 105.

The traversor is constructed in such a way that the rotary shaft 104 andthe thread shaft 103 are connected by a timing belt 108, and a movingmember 101 moving left and right in cooperation with the rotation of thethread shaft 103 is thread-engaged to the thread shaft 103, and a hole02 is formed at the moving member 101 for feeding the wire connectedwith the measured object to the bobbin 105, so the moving member 101,namely, the hole 102 moves as the bobbin 105 rotates, thus adjusting theposition where the wire having passed the hole 102 is to be wound.

In the above arts, the tensional fore of the wire wound on the bobbin105 via the hole 102 of the moving member 101 is not easy to maintaindue to diverse environmental changes, so the wire wound on the bobbin105 is overlapped in double or triple tiers as shown in FIG. 2A or iswound at different intervals as shown in FIG. 2B, which results in aproblem that the revolution of the bobbin 105 and the length of the wirewound on the bobbin 105 are not proportional to each other.

In other words, what the revolution of the bobbin 105 and the length ofthe wire wound on the bobbin 105 are not proportional to each othercomes since the measurement of the moved distance of the measure objectis not accurate. When the wire as shown in FIG. 2A is overlapped once ormore, friction occurs between the wires, thus damaging the wire, whichleads to shortening the service life of wires.

When the position of the measured object is instantly moved, the wiresgets instantly wound on the bobbin or unwound from the same, whichloosens the wire, thus twisting the wires.

DISCLOSURE OF THE INVENTION

Accordingly, it is an object of the present invention to provide atraversor guide apparatus which overcomes the above problems and makesit possible to accurately measure a moved distance of an object bykeeping a wire tightly wound on a bobbin even when a bobbin instantlyrotates.

To achieve the above object, there is provided a traversor guideapparatus which comprises a cylindrical bobbin 10 which includes aplurality of spiral grooves 11, on which a wire 1 is wound, are formedin its outer surface at regular intervals in a longitudinal direction,and a rotation through hole 12 formed at a central portion of theinterior of the same for receiving a shaft 2; a driving block 20 whichincludes an insertion hole 21, through which the wire 1 passes, and thenis engaged to the spiral groove 11, and an engaging protrusion 22 formedat its inner surface and engaged to the spiral groove 11; and a cover 30which covers an outer portion of the bobbin 10 and includes a guide slot31 for guiding the driving block 20 so that the driving block 20 canmove in a right angle direction to the rotation direction of the bobbin10 during the rotation of the bobbin 10, wherein said guide slot 31includes an inwardly protruded escape prevention part 32 contacting withan outer surface of the driving block 20 for thereby preventing anescape of the driving block 20 from happening.

In addition, at least two engaging protrusions 22 are provided andthread-engaged with the spiral grooves 11, respectively, at two or moreportions.

In addition, the guide slot 31 further comprises an escape preventionpart 32 which is inwardly protruded, thus preventing the escape of thedriving block 20 from happening as the guide slot 31 comes into contactwith the driving block 20.

ADVANTAGEOUS EFFECTS

The traversor guide apparatus according to the present invention makesit possible to accurately measure a moved distance of an object bykeeping a wire tightly wound on a bobbin even when a bobbin has aninstant rotation.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference tothe accompanying drawings which are given only by way of illustrationand thus are not limitative of the present invention, wherein;

FIG. 1 is a perspective view illustrating a conventional traversor guideapparatus;

FIGS. 2A and 2B are schematic side views illustrating a state that awire is wound on a bobbin in a non-uniform shape by means of thetraversor guide apparatus of FIG. 1;

FIG. 3 is a schematic view illustrating a state that a traversor guideapparatus is installed at a body according to a preferred embodiment ofthe present invention;

FIG. 4 is a perspective view illustrating a traversor guide apparatusaccording to a preferred embodiment of the present invention;

FIG. 5 is a disassembled perspective view illustrating a traversor guideapparatus according to a preferred embodiment of the present invention;and

FIGS. 6 and 7 are views illustrating a state that a wire having passedthrough an insertion of a driving block of a traversor guide apparatusis being wound on an outer surface of a bobbin according to a preferredembodiment of the present invention.

[Descriptions of the reference numerals] 10: bobbin 11: spiral groove12: rotation through hole 20: driving block 21: insertion hole 22:engaging protrusion 30: cover 31: guide slot 32: escape prevention part

MODES FOR CARRYING OUT THE INVENTION

The preferred embodiments of the present invention will be describedwith reference to the accompanying drawings. The same references of thefigures represent the same elements. In the descriptions of the presentinvention, the detailed descriptions of the related known functions orconstruction will be omitted so as to clarify the subject matters of thepresent invention.

FIG. 3 is a schematic view illustrating a state that a traversor guideapparatus is installed at a body according to a preferred embodiment ofthe present invention, FIG. 4 is a perspective view illustrating atraversor guide apparatus according to a preferred embodiment of thepresent invention, FIG. 5 is a disassembled perspective viewillustrating a traversor guide apparatus according to a preferredembodiment of the present invention; and FIGS. 6 and 7 are viewsillustrating a state that a wire having passed through an insertion of adriving block of a traversor guide apparatus is being wound on an outersurface of a bobbin according to a preferred embodiment of the presentinvention.

The traversor guide apparatus according to a preferred embodiment of thepresent invention comprises a bobbin 10, a driving block 20, a cover 30,a spiral groove 11, a rotation through hole 12, an insertion hole 12, anengaging protrusion 22, a guide slot 31 and an escape prevention part32.

The bobbin 10 will be first described.

As shown in FIGS. 3 and 4, the bobbin 10 is made from a cylindricalmember and has a spiral groove 11 on its outer surface. The spiralgroove 11 is continuously formed in a spiral shape in its longitudinaldirection. The engaging protrusion 22 of the driving block 20 isinserted into the spiral groove 11 and moves along an outer surface ofthe bobbin 10.

As shown in FIGS. 3 and 4, at the inner center of the bobbin 10 isformed a rotation through hole 12, and a shaft is inserted into therotation through hole 12. The engaging construction and method of theshaft 2 and the rotation through hole 12 might be implemented like thedisclosure of the Korean patent registration number 10-0927441 entitled“Traversor guide apparatus”, and their construction and method are notlimited thereto.

The driving block 20 will be described.

As shown in FIGS. 3 and 4, the driving block 20 is a member engaged to aspiral groove 11 formed on an outer surface of the bobbin 10. When theriving block 20 comes into contact with the bobbin 10, the engagingprotrusion 22 formed on an inner surface of the driving block 20 isthread-engaged with the spiral groove 11.

When the bobbin 10 rotates about the shaft 2 inserted in the rotationthrough hole 12 the driving block 20 moves along an outer surface of thebobbin 10 by means of the engagement between the spiral groove 11 andthe engaging protrusion 22. At this time, the driving block 20 moves atthe right angle direction with respect to the rotation direction of thebobbin 10 by means of the guide slot formed at the cover 30.

As shown in FIG. 7, at least two engaging protrusions 22 are provided.When more than two engaging protrusions 22 are provided, since thecontact area between the driving block 20 and the bobbin 10 increases,the driving block 20 can stably moved along the outer surface of thebobbin 10.

The cover 30 will be described.

The cover 30 serves to cover the outer side of the bobbin 10 and has aguide slot 31.

The guide slot 31 becomes open in the direction in consistent with thelongitudinal direction of the bobbin 10. The driving block 20 is guidedin the longitudinal direction of the bobbin 10 by means of the guideslot 31.

As shown in FIGS. 5 and 6, it is preferred that a driving blockpenetration part 33 sequentially formed with the guide slot 31 is formedat one end of the cover 30 so that the driving block 20 can penetrateinto the guide slot 31 when the cover 30 and the bobbin 10 engaged witheach other.

It is preferred that the escape prevention part 32 is formed at theguide slot 31 for preventing the escape of the driving block 20 fromhappening. The escape prevention part 32 is inwardly protruded from theupper side of the guide slot 31.

The inner lower surface of the inwardly protruded escape prevention part32 contacts with the outer surface of the driving block 20, thuspreventing the escape of the driving block 20 from happening.

The cover 30 covers the outer surface of the bobbin 10 in such a way toreliably fix the wire 1 at the spiral groove 11.

In another example of the present invention, the driving block 20 isfixed by the cover 30; however a hook (not shown) to be elasticallyengaged with the spiral groove 11 might be provided at the driving block20.

It is preferred that the escape prevention part 32 is protruded to anextent that the position of the driving block 20 can be recognized by aphoto sensor from the outside while preventing an escape of the drivingblock 20 from happening.

As shown in FIGS. 6 and 7, there is shown an example that the wirehaving passed through the insertion hole 21 of the driving block 20 iswound on an outer surface of the bobbin 10, so the wire 1 can be morereliably fixed by the inner surface of the cover 30.

As the present invention may be embodied in several forms withoutdeparting from the spirit or essential characteristics thereof, itshould also be understood that the above-described examples are notlimited by any of the details of the foregoing description, unlessotherwise specified, but rather should be construed broadly within itsspirit and scope as defined in the appended claims, and therefore allchanges and modifications that fall within the meets and bounds of theclaims, or equivalences of such meets and bounds are therefore intendedto be embraced by the appended claims.

1. A traversor guide apparatus, comprising: a cylindrical bobbin whichincludes a plurality of spiral grooves, on which a wire is wound, areformed in its outer surface at regular intervals in a longitudinaldirection, and a rotation through hole formed at a central portion ofthe interior of the same for receiving a shaft; a driving block whichincludes an insertion hole, through which the wire passes, and then isengaged to the spiral groove, and an engaging protrusion formed at itsinner surface and engaged to the spiral groove; and a cover which coversan outer portion of the bobbin and includes a guide slot for guiding thedriving block so that the driving block can move in a right angledirection to the rotation direction of the bobbin during the rotation ofthe bobbin, wherein said guide slot includes an inwardly protrudedescape prevention part contacting with an outer surface of the drivingblock for thereby preventing an escape of the driving block fromhappening.
 2. The apparatus of claim 1, wherein at least two engagingprotrusions are provided and thread-engaged with the spiral grooves,respectively, at two or more portions.